Improvement in spark-arresters for locomotives



W,W. PIPER. I SPARK ARRESTEILS FoaLocoMoTIvlEs. Y No. 171,951. rPatented Jan. 11., 1876.

l NPETERS. PHBTO-LITKOGRAPHER. WASWHQION. D Cz found in practice mostconvenient.

UNITED STATES PATENT OEEICEn WILLIAM W. PIPER., OF PITTSBURG,PENNSYLVANIA.

IMPROVEMENT IN SPARK-ARRESTERS FOR LOCMQTIVES.

Specification forming part of Letters Patent No. 171,951. dated January11, 1.876; application filed October 13, 1875.

To all whom 'it 'may concern:

Be it known that I, WILLIAM W. PIPER, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Smoke-Stacks Designed for Use on Locomotives.

My invention will he readily understood from the following description,taken in connection with the accompanying drawing, wherein- Figure 1represents an outside view or elevation of my improved smoke-stack; Fig.2, a vertical and central section of the same; Fig. 3, a transversesection of the lower part of the stack, taken ou the line x fr.

"Externally this smoke-stack may be constructed in any ofthe well-knownforms, but in order to grind, break up, and disintegrate the largecinders, sparks, or bits of coal, prior to their exit from'the stack, Iconstruct the cylindrical part orl portion of the stack ot' twounequal-sized barrels, A B, the one placed within the other, and soarranged as to leave a space, c, between the two. Perpendicularly withinthe smaller cylinder B is a long cone, D, of perforated sheet metal, itsbase united, by means of rivets @,sto and near vthe bottom of saidcylinder. Y Above, andin a reverse position, or so that its apex willrest upon that of the lower cone, is placed another cone, E, constructedwholly of wire-gauze netting, its base terminating in the upper insideedge of the dome F on top of the stack, and is secured in that positionby means of short bolts, transverse rivets, or by any other means Thisconstruction of smoke-stack is such that any cinders, large sparks, orbits of coal will in their Hight from the flues of the boiler rst passinto the long upright cone D, and through the numerous long narrow slitsor openings a a a made therein, and from thence through the meshes ofthe upper Wire-gauze cone E, and out at the top of the stack; butin theevent of very large sparks or bits of coal, and such as are liable tocarry fire, that have passed easily-through the openings a of the lowercone D, their outward flight will be ar rested by the neness of thewire-gauze netting or upper cone E, when they will fall back into theannular space c between the cylinders A B; passing through appropriate'holes h h around and near the bottom of the stack, will again enter thelower upright cone, 'and thus, by the upward draft `and escaping steam,

be forced once more through its narrow slitsV or openings, whichoperation will be repeated until they are reduced to that condition aswill enable them, divested of their fire', to readily and easily passthrough the meshes of the wire-gauze cone, and from thence be carriedaway with the smoke by the action of the atmosphere, the wholecontrivance operating in the manner of a straightshoot chimney.

l claim- Y 1. The upright perforated cone D and inverted wire-gauze coneE, in combination with the barrel of a locomotive smoke-stack.

2. The upright perforated cone D and inverted wire-gauze cone E, incombination with theinside cylinder B, as and for the purposes setforth. i

3. The annular space U and holes h near its bottom, in combination withthe upright perforated cone D, as and for the purposes set forth.

WM. W. PIPER. Witnesses:

JosIAH W. ELLs, ROBERT S. SILL.

